Question

During the class, Tom slipped out of the classroom ____the back door so as not to be found by the teacher.

A．across

B．in

C．by

D．beside

Answer 1

C

介词辨析。By表示方法和手段，意为：通过；结合句意可知C正确。句意：在上课期间，Tom从后面溜出教室，以免被发现。